Method for preparing cement from fly ash

Abstract

The invention relates to a method for preparing cement from fly ash, and adopts a cement manufacturing device which comprises a bottom rack, a drying mechanism, a guide groove, a screening mechanism and a collecting frame, and the cement manufacturing device can solve the following problems in the cement manufacturing process: a, because the yield of fly ash is relatively large and an indoor site is far insufficient for stacking of fly ash, the fly ash is mostly accumulated outdoors after being produced, the phenomena of moisture, caking and the like possibly exist in the fly ash due to weather and the like, a large number of sundries exist on the fly ash, and if the fly ash is not treated before cement production, the quality of cement may be affected; and b, the fly ash contains a large amount of oxides of metals such as iron and the like, if the iron oxides are not removed from the fly ash in time, the iron element content in the cement is relatively high, the proportion of cement raw material components is influenced, the model of the cement is unqualified, and the quality of the cement is influenced.

Description

technical field [0001] The invention relates to the field of cement, in particular to a method for making cement with fly ash. Background technique [0002] Cement is a powdery hydraulic non-polar gelling material. It is made of calcareous raw materials such as limestone, siliceous raw materials such as silica, and aluminum raw materials such as fly ash, which are crushed, proportioned, homogenized, preheated and fired. And grinding and other processes, the cement is mixed with water, sand and other building materials to form a slurry, which can be hardened in the air to bond the building materials together; in the cement production process, fly ash is used in the cement production process It is an important raw material for fuel, which is mainly fine solid particles discharged during the combustion process of coal. It contains a large amount of oxides and trace elements such as silicon, iron, aluminum, etc. inside. If the fly ash is directly discharged into the outside worl...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for making cement by using fly ash, which can solve the following problems in the cement production process: a. Due to the large output of fly ash, the indoor space is far from enough to stack fly ash, so fly ash is produced Most of them are piled up outdoors after being released. Due to weather and other reasons, there may be moisture agglomeration inside the fly ash, and there are many sundries outside, and there may be a large amount of sundries on the fly ash. Fly ash treatment may affect the quality of cement; b fly ash contains a large amount of metal oxides such as iron, if the fly ash is not removed in time, it may lead to the occurrence of iron in the cement. The high content will affect the proportion of cement raw materials, which will lead to unqualified cement model and affect the quality of cement

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